Catalysts for producing polyethylene with broad, bimodal molecular weight distribution

The present disclosure relates to an ansa-metallocene catalyst compound comprising (1) a first indenyl ligand substituted at the 3-position with a substituted or unsubstituted C4-C40 hydrocarbyl group, wherein the hydrocarbyl group is branched at the beta-position, and (2) a second indenyl ligand substituted at the 3-position with a substituted or unsubstituted alkyl group or a beta-branched alkylgroup. Catalyst systems prepared with the catalyst compounds, polymerization processes using such catalyst systems, and polyolefins prepared by using the polymerization processes are also described. 本公开内容涉及柄型-金属茂催化剂化合物，其包括(1)在3-位取代有取代或未取代的C-C烃基的第一茚基配体，其中所述烃基在β-位支化，和(2)在其3-位取代有取代或未取代的烷基或β-支化烷基的第二茚基配体。还描述了用所述催化剂化合物制备的催化剂体系，使用此种催化剂体系的聚合方法和使用所述聚合方法制得的聚烯烃。